You can either replace it with a new DMFW or an aftermarket single-mass flywheel (SMFW).ĭMFW vs. The springs wear over time and will eventually let go. When replacing your clutch, I highly advise that you also replace the factory dual-mass flywheel (DMFW). If you’re performing the job yourself, these tools will make the job much easier: Aluminum Transmission Bolt Set (one-time use).2 quarts of Redline D4 ATF transmission fluid.Flywheel of your choice (read SMFW vs DMFW debate below).I’d guess that it is currently around 420whp/465wtq, but only weighs 3300 lbs! My 135i won’t see more than 500 tq anytime soon. To me, it sounds like the clutch is severely underrated. Also, someone on the forums is using this clutch and claims that it is holding at over 620wtq on aftermarket turbos. Their Stage 3 550i puts down 580 tq and they kept the factory clutch. DINAN doesn’t offer a clutch upgrade for their different stages of 550i’s, so apparently they feel that it is adequate. This clutch comes factory in the F10 550i, which puts down 443 tq and weighs a whopping 4552 lbs. ![]() Then I found the 335is/550i clutch upgrade on ECSTuning, so I started to do some research. From SPEC to ACT, there are plenty of aftermarket options available. I decided it was time to upgrade so I could enjoy my 135i to it’s full potential. I knew this clutch setup wouldn’t hold, so I removed it and replaced it with a SPEC Stage 3+ unit.Īfter turning up the boost on my stock turbos, the factory clutch started to slip. In June I decided to upgrade to MMP Stage 3 turbos and chase 700whp. 2017 Update: This 335is/550i clutch setup held up great for 22k hard miles! I have absolutely no complaints.
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